| savvy(adjective, sensible, knowledgeable, aware, informed) |
| sensible(adjective, familiar, knowledgeable, skilled, aware) |
| sentient(adjective, sensible, familiar, knowledgeable, skilled) |
| sick(adjective, weak, feeble, unwell, sickly) |
| sick as a dog(expression, adjective, idiom, weak, sick) |
| sickly(adjective, weak, sick, feeble, unwell) |
| skilled(adjective, familiar, knowledgeable, aware, experienced) |
| tuned in(expression, adjective, sensible, knowledgeable, witting) |
| under the weather(expression, adjective, idiom, weak, sick) |
| unhealthy(adjective, infirm, poorly) |
| unwell(adjective, weak, sick, feeble, sickly) |
| up(adjective, familiar, knowledgeable, skilled, aware) |
| up-to-date(adjective, familiar, knowledgeable, skilled, aware) |
| up on(expression, adjective, sensible, knowledgeable, witting) |
| versant(adjective, familiar, knowledgeable, skilled, witting) |
| versed(adjective, sensible, familiar, knowledgeable, skilled) |
| well-informed(adjective, familiar, knowledgeable, skilled, aware) |
| wise to(expression, adjective, sensible, knowledgeable, witting) |
| with it(expression, adjective, sensible, knowledgeable, aware) |
| witting(adjective, sensible, sympathetic, familiar, knowledgeable) |